General Description
   The LM139 series consists of four independent precision voltage comparators with an offset voltage specification as low as 2 mV max for all for comparators. These were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. These comparators also have a unique characteristic in that the input common-mode voltage range includes ground, even though operated from a single power supply voltage.

FEATUREs
● Wide supply voltage range
● LM139/139A Series 2 to 36 VDC or ±1 to ±18VDC
● LM2901: 2 to 36 VDC or ±1 to ±18VDC
●LM3302: 2 to 28VDC or ±1 to ±14VDC
● Very low supply current drain (0.8mA) —independent of
   supply voltage
● Low input biasing current: 25nA
● Low input offset current: ±5nA
● Offset voltage: ±3mV
● Input common-mode voltage range includes GND
● Differential input voltage range equal to the power supply
   voltage
● Low output saturation Voltage: 250mV at 4 mA
● Output voltage compatible with TTL, DTL, ECL, MOS and
   CMOS logic systems

Advantages
● High precision comparators
● Reduced VOS drift over temperature
● Eliminates need for dual supplies
● Allows sensing near GND
● Compatible with all forms of logic
● Power drain suitable for battery operation